#pragma once
#include <cstdint>
#include <memory>
#include<string>
#include<iostream>
#include<unistd.h>
#include<sys/socket.h>
#include<sys/types.h>
#include<arpa/telnet.h>
#include<netinet/in.h>
#include<cstdio>
#include"Common.hpp"
#include"Log.hpp"
#include"InetAddr.hpp"

namespace  SocketModule
{
    using namespace LogModule;

    const static int gbackllog = 16;

    class Socket 
    {
    public:
        virtual ~Socket(){}
        virtual void SocketOrDie() = 0;
        virtual void BindOrDie(uint16_t port) = 0;
        virtual void ListenOrDie(int backlog) = 0;
        virtual std::shared_ptr<Socket> Accept(InetAddr* client) = 0;
        virtual void Close() = 0;
        virtual int Recv(std::string * out) = 0;
        virtual int Send(const std::string& message) = 0;
        virtual int Connect(const std::string& server_ip, uint16_t port) = 0;
        
        void BuildTcpSocketMethod(uint16_t port, int backlog = gbackllog)
        {
            SocketOrDie();
            BindOrDie(port);
            ListenOrDie(backlog);
        }

        void BuildTcpClientSocketMethod()
        {
            SocketOrDie();
        }
    };

    const static int defaultfd = -1;

    class TcpSocket : public Socket
    {
    public:
        TcpSocket(): _sockfd(defaultfd)
        {}
        TcpSocket(int fd): _sockfd(fd)
        {}
        ~TcpSocket(){}
        void SocketOrDie() override
        {
            _sockfd = ::socket(AF_INET, SOCK_STREAM, 0);
            if(_sockfd < 0)
            {
                LOG(LogLevel::FATAL)<<"socket error";
                exit(SOCKET_ERR);
            }
            LOG(LogLevel::INFO)<<"socket success";
        }

        void BindOrDie(uint16_t port) override
        {
            InetAddr localaddr(port);
            int n = ::bind(_sockfd, localaddr.NetAddrPtr(), localaddr.NetAddrLen());
            if(n < 0)
            {
                LOG(LogLevel::FATAL)<<"bind error";
                exit(BIND_ERR);
            }
            LOG(LogLevel::INFO)<<"bind success";
        }

        void ListenOrDie(int backlog) override
        {
            int n = ::listen(_sockfd, backlog);
            if(n < 0)
            {
                LOG(LogLevel::FATAL)<<"listen error";
                exit(LISTEN_ERR);
            }
            LOG(LogLevel::INFO)<<"listen success";
        }

        std::shared_ptr<Socket> Accept(InetAddr* client)override
        {
            struct sockaddr_in peer;
            socklen_t len = sizeof(peer);
            int fd = ::accept(_sockfd, CONV(peer), &len);
            if(fd < 0)
            {
                LOG(LogLevel::WARNING)<<"accept warning ...";
                return nullptr;
            }
            client->SetAddr(peer);
            return std::make_shared<TcpSocket>(fd);
        }

        int Recv(std::string * out)override
        {
            char buffer[1024];
            ssize_t n = ::recv(_sockfd, buffer, sizeof(buffer) - 1, 0);
            if(n > 0)
            {
                buffer[n] = 0;
                *out += buffer;
            }
            return n;
        }

        int Send(const std::string& message)override
        {
            return send(_sockfd, message.c_str(), message.size(), 0);
        }

        int Connect(const std::string& server_ip, uint16_t port)override
        {
            InetAddr server(server_ip, port);
            return ::connect(_sockfd, server.NetAddrPtr(),server.NetAddrLen());
        }

        void Close()override
        {
            if(_sockfd > 0)
            ::close(_sockfd);
        }

    private:
        int _sockfd;
    };

}

